Soil Formation of "Atlantic Rankers" from NW Spain—A High Resolution Aluminium and Iron Fractionation Study

作     者：J. KAAL M. COSTA-CASAIS C. FERRO-VZQUEZ X. PONTEVEDRA-POMBAL A. MARTINEZ-CORTIZAS 

作者机构：Instituto de Estudios Galegos Padre Sarmiento Laboratorio de Arqueología del Paisaje (LAr) IEGPS-CSIC-XuGaRúa San Roque 2 15704 Santiago de Compostela (Spain). Departamento de Edafología y Química Agrícola Fac. Biología Universidad de Santiago (Spain) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2008年第18卷第4期

页      面：441-453页

核心收录：

学科分类：0818[工学-地质资源与地质工程] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 090301[农学-土壤学] 

基　　金：the National Plan "Archaeological and historical context of Galician Rock Art" (2002–2005)of Spain the project "Palaeolandscape and prehistory of the Future Rock Art Park of Campo Lameiro, Pontevedra,Spain" (No.PGIDT02CCP60601) a Marie Curie Early Stage Research Training Fellowship for the Sixth FrameworkProgramme of European Community (No.MEST-CT-2004-513915) 

主　　题：铝分馏方法 崩积层 土壤学 土壤灰化作用 

摘      要：Atlantic rankers belong to the group of cryptopodzolic rankers, which are ubiquitous in the mountainous cool/tempe-rate humid regions of Western Europe. The rankers of Galicia (NW Spain) formed by thousands of years of colluviation. The preponderance of Al-stabilised organic matter (OM) masks the horizonation and polycyclic character (i.e., stratifi-cation) of these soils. Cryptopodzolic rankers are generally thought to be the outcome of podzolisation. This soil type is part of the recent discussion on how to classify soils developed from nonvolcanic parent material having andic properties. To better understand the formation processes of these soils, the Al and Fe fractionation of four typical Atlantic rankers were studied by selective dissolution in acid NH4-oxalate, Na-pyrophosphate and the chlorides of K, La and Cu. A high-resolution sampling approach allowed us to investigate the soils in greater detail than simply sampling by horizon. The rankers studied display a distribution of Fe-and Al-OM complexes that is typical of cryptopodzolic soils. However, these organomineral associations were probably immobile due to the high Al saturation. We argue that the soils owe their characteristic chemical status to external factors rather than to translocation of organomineral associations: variations in Al-OM concentrations could be linked to changes in weathering/leaching intensity and colluviation rates caused by anthropogenic disturbances or changes in regional climate regime.